Possible Clues:

• Frequently found in a sonnet?
• Frequently sentimental when leaving, at first
• Frequently, to Keats
• More than occasionally, to a bard
• It's not at all unusual to find this round the foot
• T's
• Frequently in archaic term
• Commonly, to Coleridge
• 'The good is ___ interred with their bones': 'Julius Caesar'
• Frost's 'The ___-Repeated Dream'